so jim cave is began tracking doug el. after kevin collins disappeared in san francisco he confirmed doug el traveled from the home in belmont to the cit city. the night kevin went missing. >> i determined that he was in san francisco not directly from john but from all of his friends. >>reporter: and belmont police confirmed doug el movements that day. >> john may involved in from my understanding the that they may have placed him in san francisco around the time the collins went missing. >>reporter: davis tells me he tried to report that information to san francisco police who were heading the kevin collins investigation. >> they didn't want to hear what i had to say. it was that simple. >> oh, yes san francisco police comment on davis account and give me access to the collins file. but they refused. saying it's an open investigation. but they couldn't tell me how long it has been since someone actually looked at the file. . retired sf pd inspector weaver keeps the collins information with him in case new leads developed